Sign illuminating device



FIG. 1 is a top/side perspective view of our new design;

FIG. 2 is a bottom/side perspective view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a widthwise/side view, with the other side being identical or a mirror image, thereof; and,

FIG. 6 is a lengthwise/side view, with the other side being identical or a mirror image, thereof.

The broken lines are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a sign illuminating device, as shown and described. 